Corrected calcium

Albumin-corrected serum calcium (Payne formula)

Adjusts the measured total calcium for the albumin level, so a low albumin does not hide a true hypercalcaemia. Corrected calcium = measured calcium + 0.02 x (40 minus albumin in g/L).

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Appears in these tutorials

See this calculator worked on a real patient, then read the teaching around it.

Oncological emergencies13_006
Worked example: Hanh Trinh, 66
Open tutorial
Hypocalcaemia15_106
Worked example: Samira El-Haddad, 53
Open tutorial
Hypercalcaemia15_107
Worked example: Ben Cole, 63
Open tutorial